The Entiat Mountains, or Entiat Range is a mountain range in the U.S. state of Washington. Located west of the Columbia River, north of the Wenatchee River, and south of the Entiat River, the range is part of the North Cascades section of the Cascade Range. The Entiat Range is relatively narrow east to west and long north to south. The Entiat River valley separates the Entiat Mountains from the Chelan Mountains to the northeast. To the west and south, across the Wenatchee River and tributaries such as the Chiwawa River are the Wenatchee Mountains.